Analysis of Delia XLVI: Let others sing of knights and paladines

XLVI
    Let others sing of knights and paladines
   In aged accents and untimely words;
   Paint shadows in imaginary lines
   Which well the reach of their high wits records:
   But I must sing of thee, and those fair eyes
   Authentic shall my verse in time to come,
   When yet th' unborn shall say, "Lo where she lies
   Whose beauty made him speak that else was dumb."
   These are the arks, the trophies I erect,
  That fortify thy name against old age;
  And these thy sacred virtues must protect
  Against the dark, and time's consuming rage.
  Though th' error of my youth they shall discover,
  Suffice they show I liv'd and was thy lover.